JPS605242Y2 - Gas leak alarm - automatic control device - Google Patents

Description

[Detailed description of the invention] This invention can be attached to various gas combustion appliances and devices that use propane gas or similar explosive gases as fuel to immediately detect any abnormal gas leakage. The present invention relates to a gas leak alarm and automatic control device configured to issue an alarm or display, automatically close a gas supply path, and automatically control an automatic ventilation system, a signal light, and other necessary devices.

Conventional gas leak detection means uses a gas detection element, etc. to issue an alarm when the leaked gas reaches a certain concentration, and at the same time activates a ventilator or other device by operating a relay. utensils etc. are used.

However, most of these conventional devices are installed separately from the gas equipment, and are configured to activate when the gas leaking into the room accumulates above a certain concentration, so there is no risk of small amounts of gas leaking. The disadvantage is that it cannot be detected.

In addition, since the gas supply path is not automatically shut off in the event of a gas leak, there is a defect that not only causes a large amount of gas to be lost due to a continuous leak of a small amount of gas, but also creates an extremely dangerous situation. It could also become.

Furthermore, if the room in which the alarm device is installed has good ventilation, such as in the summer when doors and windows are left open, such conventional alarm devices can be used to prevent leaked gas from accumulating. Since the gas is released into the atmosphere, even if there is a leakage of messenger gas, it cannot be detected.

Finally, as mentioned above, the conventional device has the disadvantage that it is not possible to test for leaks in the gas supply system itself because it is installed separately from the gas supply system.

Taking the above points into consideration, the present invention has a configuration fundamentally different from that of conventional gas alarm devices that use gas detection elements, and a part of the gas supplied from the gas storage tank to the gas combustion appliance is By sensing the flow of gas by utilizing the buoyancy of the bubbles that are generated when the gas passes through the liquid, even the smallest amount of gas leaks can be detected immediately and the gas can be automatically detected. It is designed to cut off the supply route and activate alarms, indicator lights, and other various alarm devices.

The structure and effects of the present invention will be described in detail with reference to the accompanying drawings.

The present invention basically includes an outflow sensing device 101 that senses the outflow state of gas, a pressure regulating device 102 that always supplies a constant amount of gas to the outflow sensing device 101 when gas is supplied,
and a switching device 103 for automatically opening and closing the gas supply path.
It consists of three parts.

The gas outflow sensing device 101 has a closed container 1 having a liquid inlet 2 at the upper part and an outlet 3 at the lower part.

In the lower part of the container 1, an L-shaped bubble container 4 having a U-shaped cross section is pivotally connected to the upper end of a support rod 5 fixed to the bottom of the container 1 via a pivot pin 6.

The bubble container 4 is rotatable in the vertical direction around the pivot pin 6.

A rod-shaped body 8 having a light shielding plate 7 integrally connected to its upper end is fixed at a suitable position on the upper surface of the bent portion of the bubble container 4.

Two hollow wiring pipes 9 and 10 are suspended in parallel from the top of the closed container 1 into the container, and each hollow wiring pipe 9,
A cylindrical portion 9A and an IOA are formed at the lower end of the cylindrical portion 10 so as to face each other.

These cylindrical portions 9A. Inside 10A, a light receiving element 11 and a light emitting source such as a light emitting lamp 12 are arranged with optical axis positional relationship.

The light shielding plate 7 includes a light receiving element 11 and a light emitting lamp 12.
It is located between the cylindrical portion 9A and IOA, each of which has a built-in cylindrical portion.

The outlet opening 13A of the gas inflow conduit 13 is located directly below the bubble container 4.

Further, water or another liquid 14 having a low evaporation rate and chemically stable against gases is injected into the airtight container 1 so that the bubble container 4 is immersed in the liquid 14.

The pressure regulating device 102 has a cylindrical body 15, the interior of which is divided into two left and right chambers 17 and 18 by a flexible, for example, rubber partition plate 16 provided at the center.

A protrusion 20 with an orifice 19 opening toward the chamber 18 on the right side is protruded from the center of the comb partition plate 16 .

A bullet piece 2 having one end of the protrusion 20 fixed to the body 15
1 by the free end.

A gas outflow pipe 22 is introduced into the center of the left chamber of the body 15, and its open end 22A is connected to the orifice 19 of the rubber partition plate 16.

The upper part of the closed container 1 and the gas outflow pipe 22 are connected to the gas outflow branch pipe 2.
Connected by 3.

The opening/closing device 103 has a valve body 26 in which a gas inlet 24 and a gas outlet 25 are formed, and a valve body 27 for controlling opening and closing of the gas outlet 25 is provided inside the valve body 26 .

The valve body 27 is fixed to the end of the drive shaft 29, and its exterior is covered with a rubber elastic cover 28.

A drive shaft 29 of the valve body 27 is connected to a core 31 of a solenoid coil 30 via a drive lever 32.

As a result, the drive shaft 29 moves up and down in response to the up and down movement of the core 31, and the valve body 27 opens and closes the gas outlet 25.

A microswitch 33 is provided at one end of a drive lever 32 that operates the drive shaft 29, so that the power source of the load can be switched in accordance with the opening/closing operation of the valve body 27.

The gas outlet 25 of the valve body 26 is connected to the left chamber 17 of the pressure regulating device 102 via a gas inlet pipe 34, and is also connected to the gas inlet pipe 13 of the outflow sensing device 101.

In addition, in FIGS. 1 and 3, reference numeral 35 indicates an elastic adjustment bolt for the bullet piece 21.

Figure 4 shows the circuit connection diagram of the device of the present invention, and shows the light emitting lamp 1.
2 is directly connected to the power supply through a resistor R□, and the solenoid coil 30 and ventilation fan or other necessary device 36 are connected to a capacitor C1, a low resistor R2, a triac (trademark) T□,
It is connected to a power source via the CDS light receiving element 11, DIAC (trademark) Dl, capacitor C2, low resistance R3, microswitch 33, and power switch SW.

Further, the microswitch 33 is connected to the contact a when the switching device 103 is open, and is switched to the contact A when the switching device 103 is in the closed state, so that the closed state is continuously maintained.

The device of the present invention formed in this way connects the gas inlet 24 of the switchgear 103 to the gas storage tank (not shown), and connects the gas outlet pipe 22 of the pressure regulator 102 to the gas combustor (not shown). It is used in conjunction with.

When gas is not used, the power switch SW is turned on, and when gas is used, it is turned off.

Since a triac gate circuit using the CDS light receiving element 11 is connected to the solenoid coil 30, the light receiving element 1
Turn on the power switch until 1 receives light and operates.
The solenoid coil 30 is not activated even if the condition is set.

Therefore, the core 31 is in a lowered state due to the elastic force of the spring, and as a result, the drive shaft 29 is also in a lowered state.

At this time, the valve body 27 opens the gas outlet 25, so that the gas flowing from the gas storage tank into the gas inlet 24 is supplied through the gas outlet 25.

In this invention, although not shown in the drawing, a power switch S
Preferably, W is linked to a normal ignition switch provided in a normal gas combustor, so that when the ignition switch is turned on, the power switch SW is turned off, and conversely, the ignition switch is turned off.
Conversely, it is advantageous to use a device in which the power switch is turned on.

The device of the present invention operates as follows.

Turn on the ignition switch of the gas burner to use gas
When the power switch SW is turned off, the power switch SW is turned off as described above.

At this time, the solenoid coil 30 becomes inactive, so the switching device 103 opens as shown in FIG.

As a result, the gas supplied from the gas storage tank via the gas inlet 24 flows out to the outlet 25 and further into the gas inlet pipe 3.
4 into the left chamber 17 of the cylindrical body 15 of the pressure regulator 102.

At the same time, a portion of this gas also flows into the closed container 1 via the inflow pipe 13.

Thus, the open end 2 of the gas outflow pipe 22 connected to the left ventricle 17
2A, the rubber partition plate 16 is applied with appropriate pressure by the bullet 21.
is pressed against the left ventricle 17, so that the gas flowing into the left chamber 17 does not flow out into the outflow pipe 22 and receives a slight resistance from the rubber partition plate 16.

As a result, the gas preferentially flows into the liquid 14 in the container 1 through the opening 13A of the gas inlet conduit 13, which has less resistance to outflow, and rises from the liquid while forming bubbles.

The generated bubbles rise and gather inside the bubble container 4, and due to their buoyancy, the bubble container 4 is rotated around the pivot pin 6 and lifted up, and as a result, the light shielding plate fixed to the bubble container 4 is lifted. 7 moves to the broken line position 7' in Fig. 2, and the cylindrical part 9A
, retreat from between 10A.

As a result, the CDS light-receiving element 11 receives light from the lamp 12, opens the triac gate of the circuit configured as described above, and supplies current, thus turning on the use indicator light, leakage signal light, or device such as an air ventilator. Activate it.

The gas that has passed through the liquid 14 is supplied to the combustor via a gas outlet pipe 22 via a gas outlet branch 23 .

However, only a small amount of the gas passing through the closed container 1 is supplied through the small-diameter gas outflow pipe 23 and is limited to a small amount by the low pile of the liquid 14, so that the amount of gas consumed that must pass through the gas outflow pipe 22 is limited to a small amount. When the pressure is high, a difference in air pressure occurs between the two chambers 17 and 18 that are bordered by the rubber partition plate 16.

That is, the atmospheric pressure in the right ventricle 18 decreases due to the suction force on the gas outlet pipe 22 side via the orifice 19, and conversely, the atmospheric pressure in the left ventricle 17 decreases.
Since a constant gas pressure is maintained inside, the rubber partition plate 16 curves and recesses to the right in FIG. 3 while resisting the elastic force of the bullet piece 21, and the open end 22A of the gas outlet pipe 22 gradually opens. As a result, the large amount of gas required by the combustor can be supplied.

When the ignition switch of the gas combustor is turned off after the gas has been used, the power switch SW is turned ON for interlocking operation, and the flow of gas is stopped, so the generation of bubbles is stopped, and the bubble containing device 4 and light shielding plate 7 are released under their own weight. Return to position.

As a result, the light beam incident on the ODS element from the light emitting lamp 12 is blocked again, and the operation of the indicator light, ventilation, etc. is automatically stopped.

In such a situation, when gas leaks from a part of the gas supply system when no gas is used, bubbles are generated again by the flow of gas, and the indicator light and ventilation operate as described above. .

At the same time, current is supplied to the solenoid coil 30 via the microswitch 33 and the ON power switch SW, causing the core 31 to rise, and the drive shaft 29 to rise due to the actuation of the lever 32, causing the valve body 27 to flow through the gas flow. Exit 25
Seal and cut off the flow of gas.

Also, at this time, the tip of the drive lever 32 pushes the microswitch 33 and switches to the b contact, thereby achieving continuous current supply and continuously maintaining the closed state.

As described above, the present invention provides a device in the gas supply pipe that includes a gas outflow sensing device 101, a pressure regulating device 102, and a switching device 103, so that the gas to be supplied to the gas combustor is controlled by the pressure regulating device 1.
02, a certain amount of gas is sent to the outflow sensing device 103, and by sensing the outflow state of this gas, it is not only possible to display and control various necessary devices, but also to detect even a very small amount of gas leakage. Even if there is a problem, this can be detected and the gas supply can be automatically cut off to prevent an accident from occurring.

Furthermore, all the equipment can be used while being inspected every day, and gas loss can be reduced.

Furthermore, in the present invention, only a very small amount of gas is supplied to the outflow sensing device 101 by the pressure regulator 102, thereby minimizing the amount of evaporation of the liquid that occurs when the gas passes through the liquid in the outflow sensing device. It can be used continuously without replenishing liquid for a long time.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the device of the present invention showing the state when gas is not used, Fig. 2 is an enlarged perspective view of the gas leak detection device in the present invention, and Fig. 3 is the state when gas is used or gas leaks. FIG. 4 is a sectional view of the device according to the present invention, and FIG. 4 is a control circuit diagram of the device according to the present invention. 1... Container, 4... Air bubble container, 7...
... Light shielding plate, 11 ... Light receiving element, 12 ...
...Light-emitting lamp, 15...Body, 16...
...Rubber partition plate, 17, 18... Room, 19...
... Orifice, 26 ... Valve body, 2
7... Valve body, 30... Solenoid coil, 101... Outflow sensing device, 102...
...Pressure adjustment device, 103...Switching device.

Claims (1)

[Scope of utility model registration request] The bubble containing device 4 is provided with a light-receiving element 11 and a light-emitting source 12 facing each other inside a sealed container 1 filled with a liquid 14, and a light-shielding plate 7 extending between the light-receiving element and the light-emitting source. A gas inflow pipe is rotatably attached to the container 1 within the liquid 14 of the closed container 1 so that the light-shielding plate 7 can block the space between the light-receiving element and the light-emitting source. Gas outflow sensing device 101 comprising opening 13A of channel 13; two chambers 17, 18 divided by flexible partition plate 16 with orifice 19 bored therein;
The opening end 22A of the gas outlet pipe 22 is brought into close contact with one side of the partition plate 16, and a bullet 21 is provided on the other side.
and a valve connected to the gas outflow sensing device 101 and the pressure regulating device 102 via gas inflow pipes 34 and 13, respectively, and which is automatically opened and closed by the solenoid coil 30. A gas leak alarm-automatic control device comprising a switchgear 103;